fix e2ee type conversion issue

Author: maxkahan

opentok/opentok.py

@@ -458,24 +458,23 @@ def create_session(
                     ).format(location)
                 )
             options[u("location")] = location
-        options["e2ee"] = e2ee
+        options["e2ee"] = str(e2ee).lower()
 
         try:
             logger.debug(
                 "POST to %r with params %r, headers %r, proxies %r",
                 self.endpoints.session_url(),
                 options,
-                self.headers(),
+                {**self.get_headers(), "Accept": "application/json"},
                 self.proxies,
             )
             response = requests.post(
                 self.endpoints.get_session_url(),
                 data=options,
-                headers=self.get_headers(),
+                headers={**self.get_headers(), "Accept": "application/json"},
                 proxies=self.proxies,
                 timeout=self.timeout,
             )
-
             response.encoding = "utf-8"
 
             if response.status_code == 403:

tests/test_session_creation.py

@@ -39,7 +39,12 @@ def test_create_default_session(self):
 
         validate_jwt_header(self, httpretty.last_request().headers[u("x-opentok-auth")])
         expect(httpretty.last_request().headers[u("user-agent")]).to(
-            equal(u("OpenTok-Python-SDK/") + __version__ + ' python/' + platform.python_version())
+            equal(
+                u("OpenTok-Python-SDK/")
+                + __version__
+                + " python/"
+                + platform.python_version()
+            )
         )
         body = parse_qs(httpretty.last_request().body)
         expect(body).to(have_key(b("p2p.preference"), [b("enabled")]))
@@ -310,7 +315,7 @@ def test_create_session_with_e2ee(self):
         session = self.opentok.create_session(e2ee=True)
 
         body = parse_qs(httpretty.last_request().body)
-        expect(body).to(have_key(b("e2ee"), [b"True"]))
+        expect(body).to(have_key(b("e2ee"), [b"true"]))
         expect(session).to(be_a(Session))
         expect(session).to(
             have_property(